Answer:
2 cans
Step-by-step explanation:
Calculate how many pounds he needs for one day:
3(0.5)=1.5 pounds for each day Alvin is gone ( 3 represents his dogs, .5 is each dog's food)
Convert into ounces:
1.5*16=24 ounces for one day
Question: If dog food is sold in 12 oz cans, how many will he need?
24/12=2 cans
Thus, he will need 2 cans
 
        
             
        
        
        
First do inside the parenthesis first.
 When dividing two exponents subtract them.
 15-5 = 10
So w^15 / w^5 becomes w^10
Now you have (w^10)^4
Now multiply the exponents:
 10 x 4 = 40
 Final answer is w^40
 
        
             
        
        
        
I believe the answers are 1. C 2. B 3. D 4. C 5. A
        
                    
             
        
        
        
Answer: x" = 5.69
Step-by-step explanation:
The graphic solution is attached.
Verifying the solution:
Existence condition: x > 0
2x - 4 = √x + 5 
√x =2x - 4 - 5
√x =2x - 9 (²)
x = (2x - 9)²
x = 4x² - 36x + 81
 4x² - 36x - x + 81 = 0
 4x² - 37x + 81 = 0
Δ = -37² - 4.4.81 = 1369 - 1296 = 73
x = 37 ±√73/8                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
x' = 3.55
x" = 5.69
checking:
2*3.55 - 4 = 3.1
√3.55 + 5 = 6.88 Its not the same ∴ 3.55 is not a solution
2*5.69 - 4 = 7.39
√5.69 + 5 = 7.39 ∴ it's the only solution
 
        
             
        
        
        
Answer:
k-7 70
70
Step-by-step explanation: it says no less than 70 implying it could be 70 or above. Greater than or equal to seventy is the correct answer.